<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2021000300331</article-id>
<article-id pub-id-type="doi">10.29356/jmcs.v65i3.1500</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Design, Synthesis, and Evaluation of New Colorimetric Chemosensors Containing Quinazolinones Moiety for some Cations Detection in an Aqueous Medium and Biological Sample]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Algohary]]></surname>
<given-names><![CDATA[Ayman. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hassan]]></surname>
<given-names><![CDATA[Mohamed M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almalki]]></surname>
<given-names><![CDATA[Sami G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Al-Malki]]></surname>
<given-names><![CDATA[Esam S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Majmaah University College of Science Al-zulfi Department of Chemistry]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Saudi Arabia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Egyption Drug Authority  ]]></institution>
<addr-line><![CDATA[Giza ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Ain Shams University Faculty of Education Chemistry Department]]></institution>
<addr-line><![CDATA[Cairo ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Majmaah University College of Applied Medical Sciences Medical Laboratory Department]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Saudi Arabia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Majmaah University College of Science Al-zulfi Department of Biology]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Saudi Arabia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>65</volume>
<numero>3</numero>
<fpage>331</fpage>
<lpage>346</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2021000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2021000300331&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2021000300331&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The current project deals with designing and synthesizing of colorimetric chemosensors to detect the cations in the aqueous medium and biological sample. To achieve this goal a new series of quinazolinone derivatives were synthesized via reaction of the novel 6-nitro-2-propyl-4H- benzo[d][1,3]oxazin-4-one (3) with selected nitrogen nucleophiles, namely, formamide, hydrazine hydrate, hydroxylamine hydrochloride, O-phenylendiamine, O-aminophenol and O-aminothiophenol, urea and/or thiourea. Structures of the new compounds have been investigated depending on their spectral data (IR, 1H NMR, 13C NMR and MS) and elemental analyses. Some of the newly synthesized products exhibited a significant response as chemosensors for some cations detection. The synthesized chemosensors 11a and 11b showed high-selectivity and specificity towards cooper (CuII) and mercury (HgII) cations detection through exhibiting colormetric responses. Chemosensors 7 and 10 b showed high selectivity toward cadmium (CdII) cation, whilst other examined compounds (9b, c, 10a, 12, 13, and 14) did not exhibit colorimetric response in all cation's samples.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En el presente proyecto se diseñan y sintetizan quimiosensores colorimétricos para detectar los cationes en el medio acuoso y en la muestra biológica. Para lograr este objetivo se sintetizó una nueva serie de derivados de quinazolinona mediante la reacción de la 6-nitro-2-propil-4H-benzo[d][1,3]oxazin-4-ona (3) con nucleófilos nitrogenados seleccionados, a saber, formamida, hidrato de hidracina, clorhidrato de hidroxilamina, O- fenilendiamina, O -aminofenol y O-aminotiofenol, urea y/o tiourea. Las estructuras de los nuevos compuestos se han comprobado en función de sus datos espectrales (IR, 1H NMR, 13C NMR y MS) y de los análisis elementales. Algunos de los nuevos productos sintetizados mostraron una respuesta significativa como quimiosensores para la detección de algunos cationes. Los quimiosensores sintetizados 11a y 11b mostraron una alta selectividad y especificidad hacia la detección de los cationes cobre (Cu II) y mercurio (Hg II) al mostrar respuestas colormétricas. Los quimiosensores 7 y 10b mostraron una alta selectividad hacia el catión cadmio (Cd II), mientras que otros compuestos examinados (9b, c, 10a, 12, 13 y 14) no mostraron respuesta colorimétrica con los cationes investigados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Chemosensor]]></kwd>
<kwd lng="en"><![CDATA[quinazolinone]]></kwd>
<kwd lng="en"><![CDATA[copper]]></kwd>
<kwd lng="en"><![CDATA[cadmium]]></kwd>
<kwd lng="en"><![CDATA[mercury]]></kwd>
<kwd lng="es"><![CDATA[Químiosensor]]></kwd>
<kwd lng="es"><![CDATA[quinazolina]]></kwd>
<kwd lng="es"><![CDATA[cobre]]></kwd>
<kwd lng="es"><![CDATA[cadmio]]></kwd>
<kwd lng="es"><![CDATA[mercurio]]></kwd>
</kwd-group>
</article-meta>
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